Tension means for lawn-tennis rackets.



P. D. PARSONS. TENSIUN MEANS FOR LAWN TENNIS RACKETS. APPLICATIGH mm mm. 1 914.

1 1% 2%Q Patented May18, 1915.

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DOUGLAS ransons, or PHILADELPHIA, PENNSYLVANIA.

' TENSION non awn-reams nincxars.

Specifieation of Letters lPatent.

Application filed May 2, 1914. Serial my 836,005.

To all whom it may concern:

Be it known thatv I, PHILIP D. PARsoNs, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia 'andfitate of Pennsylvania, have invented certain new and useful- Improvements in Tension Means for Lawn-Tennis Rackets;

and I do hereby declare the following tobe a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and J v use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

This invention relates to new and useful improvements in devices for regulatingthe' tension of the strings upon tennis., rackets and consists of a simple and eflicient device of this nature providing means whereby stringsrmay be drawn taut without the necessity of restringing the Whole racket.

My invention comprises various details of construction, combinations and arrange screw eye. 1

Reference now being'had to the details 'of the drawings by" letter, A' designates the frame of; a racket and B the strings. Holes E are formed in the racket frame, one hole having a shoulder adapted to receive and hold the knotted end of the string, said string being. adapted to engage an eye D formed in the screw D which fits a hole F in the oppositeside of the frame. A nut,

' designated by letter K, is mounted upon said threaded screw and is adapted to turn in an enlarged part of the hole which the Patented May is, 19 15;

threaded end of the screw projects. -.Slots" N are formed in the outer end' of the nut, forming a convenient means for'engagement with a key. R, having lugs projecting from.

the end thereof and which are designed to engage said slots and forming a convenient means whereby the nut may be turned in one direction or the otheraocordingly as it may be desired "to impart a longitudinal movement to the screw to regulate the tension of the string,

embodying the features of my invention, it will be noted that a simple and eflicient strings of the racket may be conveniently tightened without necessity of restringing the whole racket.

What I claim to be new is:

In combination with the frame of a racket having cylindrical\ apertures therein err-- larged at the outeriends, a screw provided with a rounded unthreaded end which is apertured, a strand passing through one aperture and having a knot engaging a shoulder therein and passing through the. aperture in said screw, the unthreaded end of the screw being adapted to engage and hold the strand frictionally at points diametrically opposite against the marginal edge of the aperture in which the screw is located, a washer engaging a shoulder in the aperture in which the screw is mounted, and a hollow nut, interiorly threaded, engagmg the screw and bearing against said washer,

the provision of a tightening means.

'60 -means is afiorded whereby the individual the outer end of the nut having notches therein for the reception of a key.

In testimony whereof ll hereunto affix my signature in presence of two Witnesses.

PHILIP DOUGLAS masons.

Witnesses:

Rosa G. Fox, RUSSELL G. BANNIs'rER. 

